X-Ray Machine
The very first X ray device was discovered accidentally by the German scientist Wilhelm Röntgen (1845-1923) in 1895. He found that a cathode-ray tube emitted certain invisible rays ...
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X-Ray Machine
The very first X-ray device was discovered accidentally by the German scientist Wilhelm Röntgen (1845-1923) in 1895. He found that a cathode-ray tube emitted certain invisible rays ...
Read more